Use COMPAT_ENGINES instead of RenderEngine.use_game_engine for panel poll methods

This mostly affects physics panels. Any engines relying on
RenderEngine.use_game_engine flag to show/hide panels will need to be
updated. The COMPAT_ENGINES technique is how we usually deal with this.
One issue with use_game_engine is that I cannot find a way to set it; it
appears only the BGE can set it. This means (without this commit)
external RenderEngines cannot get rid of the default physics panels.

The RE_GAME flag (the C flag behind use_game_engine) is pretty hacky
and we should look into removing its usage where possible.

1 files changed, 2 insertions, 1 deletions

diff --git a/release/scripts/startup/bl_ui/properties_physics_common.py b/release/scripts/startup/bl_ui/properties_physics_common.py
index 82eecf0fb5a..277b59d187d 100644
--- a/release/scripts/startup/bl_ui/properties_physics_common.py
+++ b/release/scripts/startup/bl_ui/properties_physics_common.py
@@ -31,7 +31,7 @@ class PhysicButtonsPanel:
     @classmethod
     def poll(cls, context):
         rd = context.scene.render
-        return (context.object) and (not rd.use_game_engine)
+        return (context.object) and rd.engine in cls.COMPAT_ENGINES
 
 
 def physics_add(self, layout, md, name, type, typeicon, toggles):
@@ -57,6 +57,7 @@ def physics_add_special(self, layout, data, name, addop, removeop, typeicon):
 class PHYSICS_PT_add(PhysicButtonsPanel, Panel):
     bl_label = ""
     bl_options = {'HIDE_HEADER'}
+    COMPAT_ENGINES = {'BLENDER_RENDER'}
 
     def draw(self, context):
         obj = context.object